Lol.
Or - If "stupid people" have low ability to spend their money in a smart way (since they can't accurately estimate which products have the best price/quality ratio), by losing money on lottery they are actually transferring their wealth to smarter people, who will probably spend that wealth in a more optimal way. Thus, they are actually making a personal sacrifice as part of a grand strategy to allow the society to spend its wealth in a more optimal way.
Heh, either way, the "stupid" people are transferring their money to the wealthy. Either the "stupd" people squander the money or give it to the state, which collects billions annually. Money follows knowledge.